Add async generator tests

test/language/expressions/async-generator/yield-thenable-create-resolving-functions-reject.js

@@ -0,0 +1,74 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-generator-function-definitions-runtime-semantics-evaluation
+description: >
+  `reject` is anonymous built-in function with length of 1.
+info: |
+  YieldExpression : yield AssignmentExpression 
+
+  [...]
+  4. If generatorKind is async, then return ? AsyncGeneratorYield(value).
+
+  AsyncGeneratorYield ( value )
+
+  [...]
+  5. Set value to ? Await(value).
+  [...]
+  9. Return ! AsyncGeneratorResolve(generator, value, false).
+
+  Await
+
+  [...]
+  2. Let promise be ? PromiseResolve(%Promise%, value).
+  [...]
+
+  PromiseResolve ( C, x )
+
+  [...]
+  3. Let promiseCapability be ? NewPromiseCapability(C).
+  4. Perform ? Call(promiseCapability.[[Resolve]], undefined, « x »).
+  5. Return promiseCapability.[[Promise]].
+
+  NewPromiseCapability ( C )
+
+  [...]
+  7. Let promise be ? Construct(C, « executor »).
+  [...]
+  11. Return promiseCapability.
+
+  Promise ( executor )
+
+  [...]
+  8. Let resolvingFunctions be CreateResolvingFunctions(promise).
+  [...]
+  11. Return promise.
+
+  CreateResolvingFunctions ( promise )
+
+  [...]
+  7. Let reject be ! CreateBuiltinFunction(stepsReject, « [[Promise]], [[AlreadyResolved]] »).
+  [...]
+  10. Return the Record { [[Resolve]]: resolve, [[Reject]]: reject }.
+flags: [async]
+features: [async-iteration, Reflect.construct]
+includes: [isConstructor.js]
+---*/
+
+var thenable = {
+  then: function(resolve, reject) {
+    resolve(reject);
+  },
+};
+
+var iter = (async function*() {
+  yield thenable;
+}());
+
+iter.next().then(function(result) {
+  var reject = result.value;
+  assert(!isConstructor(reject));
+  assert.sameValue(reject.length, 1);
+  assert.sameValue(reject.name, '');
+}).then($DONE, $DONE);

test/language/expressions/async-generator/yield-thenable-create-resolving-functions-resolve.js

@@ -0,0 +1,74 @@
+// Copyright (C) 2020 Alexey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-generator-function-definitions-runtime-semantics-evaluation
+description: >
+  `resolve` is anonymous built-in function with length of 1.
+info: |
+  YieldExpression : yield AssignmentExpression 
+
+  [...]
+  4. If generatorKind is async, then return ? AsyncGeneratorYield(value).
+
+  AsyncGeneratorYield ( value )
+
+  [...]
+  5. Set value to ? Await(value).
+  [...]
+  9. Return ! AsyncGeneratorResolve(generator, value, false).
+
+  Await
+
+  [...]
+  2. Let promise be ? PromiseResolve(%Promise%, value).
+  [...]
+
+  PromiseResolve ( C, x )
+
+  [...]
+  3. Let promiseCapability be ? NewPromiseCapability(C).
+  4. Perform ? Call(promiseCapability.[[Resolve]], undefined, « x »).
+  5. Return promiseCapability.[[Promise]].
+
+  NewPromiseCapability ( C )
+
+  [...]
+  7. Let promise be ? Construct(C, « executor »).
+  [...]
+  11. Return promiseCapability.
+
+  Promise ( executor )
+
+  [...]
+  8. Let resolvingFunctions be CreateResolvingFunctions(promise).
+  [...]
+  11. Return promise.
+
+  CreateResolvingFunctions ( promise )
+
+  [...]
+  3. Let resolve be ! CreateBuiltinFunction(stepsResolve, « [[Promise]], [[AlreadyResolved]] »).
+  [...]
+  10. Return the Record { [[Resolve]]: resolve, [[Reject]]: reject }.
+flags: [async]
+features: [async-iteration, Reflect.construct]
+includes: [isConstructor.js]
+---*/
+
+var thenable = {
+  then: function(resolve) {
+    resolve(resolve);
+  },
+};
+
+var iter = (async function*() {
+  yield thenable;
+}());
+
+iter.next().then(function(result) {
+  var resolve = result.value;
+  assert(!isConstructor(resolve));
+  assert.sameValue(resolve.length, 1);
+  assert.sameValue(resolve.name, '');
+}).then($DONE, $DONE);